The CH1-1012 from Ruknar JSC is a Rubidium Oscillator with Frequency 10 MHz, Frequency Retrace ±0.02 ppb, Supply Voltage 22 to 28 V, Input Power 12 to 20 W, Short Term Stability 0.003 to 0.03 ppb. Tags: Module with Connector. More details for CH1-1012 can be seen below.